This is a thematic cube based on board game Lost Ruins of Arnak and its expansions.
Cards are selected to fit the Arnak world - mostly to directly represent cards or components from the board game (so while drafting and playing you can try to find as many of these easter eggs ;-)

For example expedition leaders from both expansions:

In the Arnak board game you have to discover new sites. In the Arnak cube
you have to "discover" all your lands. (You have to draft your lands. No additional basic lands available. This type of cube is also known as desert cube.)

Cube is drafted in pod of 4 players with 3 packs of 19 cards. Whole cube is drafted to ensure there will be enough lands available in the draft (80 total lands means 20 lands per player). Final decks usually end up in three colors.

There are no strict archetypes, rather synergies, themes and supported mechanics: mechanic explore, artifacts, equipments, vehicles, mill, soft land destruction, counters and proliferate, sacrifice and tokens, learn and lesson.

This cube is inspired by @UberBear 's Monopoly cube - https://cubecobra.com/cube/overview/Monopoly